Beginning thoughts....
Is the road that you access your property from belong to the Parish or privately owned & will you have right-of-way access to your property? If you access across someone's property without a right-of-way easement...you could lose that access at anytime.
Is there water or electric connections? Will you have your own meters or will you have to share & possibly pay someone else's portion of the bill.
Is there a sewer connection from the main or do you have to build your own septic system? If you have to build your own & because you're located close to the water you may need Parish Council/enviromental approval.